/*
 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.itsaky.androidide.plugins.properties.parser;

import java.util.regex.Pattern;

/**
 * A line of text within the message file. The lines form a doubly linked list for simple
 * navigation.
 */
public class MessageLine {

  static final Pattern emptyOrCommentPattern = Pattern.compile("( *#.*)?");
  static final Pattern typePattern = Pattern.compile("[-\\\\'A-Z\\.a-z ]+( \\([-A-Za-z 0-9]+\\))?");
  static final Pattern infoPattern = Pattern.compile(String.format("# ([0-9]+: %s, )*[0-9]+: %s",
      typePattern.pattern(), typePattern.pattern()));

  public String text;
  MessageLine prev;
  MessageLine next;

  MessageLine(String text) {
    this.text = text;
  }

  public boolean isEmptyOrComment() {
    return emptyOrCommentPattern.matcher(text).matches();
  }

  public boolean isInfo() {
    return infoPattern.matcher(text).matches();
  }

  boolean hasContinuation() {
    return (next != null) && text.endsWith("\\");
  }

  MessageLine append(String text) {
    MessageLine l = new MessageLine(text);
    append(l);
    return l;
  }

  void append(MessageLine l) {
    assert l.prev == null && l.next == null;
    l.prev = this;
    l.next = next;
    if (next != null) {
      next.prev = l;
    }
    next = l;
  }
}
